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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC312XDP512F0MPVR датащи(PDF) 844 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 844 Page - Freescale Semiconductor, Inc |
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844 / 1348 page  Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2) MC9S12XDP512 Data Sheet, Rev. 2.21 846 Freescale Semiconductor 22.3.2.26 Port S Reduced Drive Register (RDRS) Read: Anytime. Write: Anytime. This register configures the drive strength of each port S output pin as either full or reduced. If the port is used as input this bit is ignored. 22.3.2.27 Port S Pull Device Enable Register (PERS) Read: Anytime. Write: Anytime. This register configures whether a pull-up or a pull-down device is activated, if the port is used as input or as output in wired-OR (open drain) mode. This bit has no effect if the port is used as push-pull output. Out of reset a pull-up device is enabled. 76543210 R RDRS7 RDRS6 RDRS5 RDRS4 RDRS3 RDRS2 RDRS1 RDRS0 W Reset 00000000 Figure 22-28. Port S Reduced Drive Register (RDRS) Table 22-28. RDRS Field Descriptions Field Description 7–0 RDRS[7:0] Reduced Drive Port S 0 Full drive strength at output. 1 Associated pin drives at about 1/6 of the full drive strength. 76543210 R PERS7 PERS6 PERS5 PERS4 PERS3 PERS2 PERS1 PERS0 W Reset 11111111 Figure 22-29. Port S Pull Device Enable Register (PERS) Table 22-29. PERS Field Descriptions Field Description 7–0 PERS[7:0] Pull Device Enable Port S 0 Pull-up or pull-down device is disabled. 1 Either a pull-up or pull-down device is enabled. |
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